FR2363254A1 - AUTOMATIC MICROPHONE MIXER - Google Patents

AUTOMATIC MICROPHONE MIXER

Info

Publication number
FR2363254A1
FR2363254A1 FR7626091A FR7626091A FR2363254A1 FR 2363254 A1 FR2363254 A1 FR 2363254A1 FR 7626091 A FR7626091 A FR 7626091A FR 7626091 A FR7626091 A FR 7626091A FR 2363254 A1 FR2363254 A1 FR 2363254A1
Authority
FR
France
Prior art keywords
automatic microphone
microphone mixer
average amplitude
signal
mixer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7626091A
Other languages
French (fr)
Other versions
FR2363254B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of FR2363254A1 publication Critical patent/FR2363254A1/en
Application granted granted Critical
Publication of FR2363254B1 publication Critical patent/FR2363254B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/02—Remote control of amplification, tone or bandwidth
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/32—Automatic control in amplifiers having semiconductor devices the control being dependent upon ambient noise level or sound level
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/341—Muting when no signals or only weak signals are present
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
    • H04R2201/403—Linear arrays of transducers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

L'invention concerne un mélangeur automatique de microphones. Il comporte plusieurs canaux d'entrée comprenant chacun un circuit de commande. Chacun de ces circuits de commande reçoit le signal d'entrée correspondant et le multiplie par le quotient de l'amplitude moyenne de ce signal par l'amplitude moyenne de la somme de tous les signaux d'entrée. L'invention s'applique à la sonorisation de salles.The invention relates to an automatic microphone mixer. It has several input channels each comprising a control circuit. Each of these control circuits receives the corresponding input signal and multiplies it by the quotient of the average amplitude of this signal by the average amplitude of the sum of all the input signals. The invention applies to sound systems for rooms.

FR7626091A 1975-05-09 1976-08-30 AUTOMATIC MICROPHONE MIXER Granted FR2363254A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/575,951 US3992584A (en) 1975-05-09 1975-05-09 Automatic microphone mixer

Publications (2)

Publication Number Publication Date
FR2363254A1 true FR2363254A1 (en) 1978-03-24
FR2363254B1 FR2363254B1 (en) 1981-01-09

Family

ID=24302362

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7626091A Granted FR2363254A1 (en) 1975-05-09 1976-08-30 AUTOMATIC MICROPHONE MIXER

Country Status (4)

Country Link
US (1) US3992584A (en)
DE (1) DE2640006C2 (en)
FR (1) FR2363254A1 (en)
GB (1) GB1516256A (en)

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US4149032A (en) * 1978-05-04 1979-04-10 Industrial Research Products, Inc. Priority mixer control
US4495638A (en) * 1978-05-17 1985-01-22 Body Sonic Kabushiki Kaisha Audio-band electro-mechanical vibration converter
US4239938A (en) * 1979-01-17 1980-12-16 Innovative Electronics Design Multiple input signal digital attenuator for combined output
WO1980001529A1 (en) * 1979-01-17 1980-07-24 Innovative Electronic Designs Multiple program audio system
US4374300A (en) * 1979-10-18 1983-02-15 Innovative Electronics, Inc. Sound mixer devices
US4357492A (en) * 1980-10-03 1982-11-02 Eugene Campbell Automatic microphone mixing apparatus
US4454609A (en) * 1981-10-05 1984-06-12 Signatron, Inc. Speech intelligibility enhancement
JPS5921200A (en) * 1982-07-26 1984-02-03 Minolta Camera Co Ltd Hearing aid incorporating radio set
US4489442A (en) * 1982-09-30 1984-12-18 Shure Brothers, Inc. Sound actuated microphone system
US4941187A (en) * 1984-02-03 1990-07-10 Slater Robert W Intercom apparatus for integrating disparate audio sources for use in light aircraft or similar high noise environments
US4598418A (en) * 1985-02-05 1986-07-01 Griffith Jr Eugene R Sound system employing automatic proportional amplification
US4864627A (en) * 1986-11-07 1989-09-05 Dugan Daniel W Microphone mixer with gain limiting and proportional limiting
DE3734447C1 (en) * 1987-10-12 1989-05-18 Telefonbau & Normalzeit Gmbh Conference speakerphone
US4881123A (en) * 1988-03-07 1989-11-14 Chapple James H Voice override and amplitude control circuit
US4885792A (en) * 1988-10-27 1989-12-05 The Grass Valley Group, Inc. Audio mixer architecture using virtual gain control and switching
US5204908A (en) * 1990-09-26 1993-04-20 Lectrosonics, Inc. Sound system with rate controlled, variable attenuation
US5490219A (en) * 1991-03-04 1996-02-06 Motorola, Inc. Noise canceling microphone with visual feedback
US5309517A (en) * 1991-05-17 1994-05-03 Crown International, Inc. Audio multiplexer
US5259035A (en) * 1991-08-02 1993-11-02 Knowles Electronics, Inc. Automatic microphone mixer
US5291558A (en) * 1992-04-09 1994-03-01 Rane Corporation Automatic level control of multiple audio signal sources
US5197098A (en) * 1992-04-15 1993-03-23 Drapeau Raoul E Secure conferencing system
JP2757740B2 (en) * 1992-11-30 1998-05-25 ヤマハ株式会社 Distortion circuit
US5414776A (en) * 1993-05-13 1995-05-09 Lectrosonics, Inc. Adaptive proportional gain audio mixing system
US5440643A (en) * 1993-05-13 1995-08-08 Apple Computer, Inc. Audio peripheral mixer circuit and method for noise reduction
US5652800A (en) * 1995-11-02 1997-07-29 Peavey Electronics Corporation Automatic mixer priority circuit
US5673327A (en) * 1996-03-04 1997-09-30 Julstrom; Stephen D. Microphone mixer
US6125343A (en) * 1997-05-29 2000-09-26 3Com Corporation System and method for selecting a loudest speaker by comparing average frame gains
FI980559A (en) * 1998-03-13 1999-09-14 Nokia Mobile Phones Ltd Audiosummauskytkentä
US6233548B1 (en) 1998-07-29 2001-05-15 Stephen R. Schwartz Method and apparatus for performing level compensation for an input signal
US6690804B2 (en) * 2000-06-28 2004-02-10 Peavey Electronics Corporation Lighted microphone cable indicator
US7206421B1 (en) * 2000-07-14 2007-04-17 Gn Resound North America Corporation Hearing system beamformer
US20030050994A1 (en) * 2001-07-27 2003-03-13 Robert Pollack Method of aggregating, classifying, reporting and cross-tabbing data in real time
CN1993883B (en) * 2004-05-18 2010-04-21 Nxp股份有限公司 Amplifier circuit with automatic gain correction
KR100638337B1 (en) * 2005-09-05 2006-10-24 주식회사 비손하이테크 Apparatus and method for noise removal and mobile phone with noise removal function
US7957546B2 (en) * 2005-12-13 2011-06-07 Waller Jr James K Multi-channel noise reduction system with direct instrument tracking
US9040806B1 (en) 2005-12-13 2015-05-26 James K. Waller, Jr. Multi-channel noise reduction system with direct instrument tracking
EP2504712B1 (en) * 2009-11-23 2021-03-24 Hittite Microwave LLC Logarithmic mean-square power detector
EP2504921B1 (en) * 2009-11-23 2020-06-17 Hittite Microwave LLC Logarithmic mean-square power detector with servo control loop
US8542849B2 (en) 2010-08-02 2013-09-24 Rane Corporation Apparatus, method, and manufacture for connectable gain-sharing automixers
US9625498B2 (en) 2010-09-17 2017-04-18 Hittite Microwave Llc RMS and envelope detector
US9589550B2 (en) 2011-09-30 2017-03-07 Harman International Industries, Inc. Methods and systems for measuring and reporting an energy level of a sound component within a sound mix
KR101219709B1 (en) * 2011-12-07 2013-01-09 현대자동차주식회사 Auto volume control method for mixing of sound sources
US9158496B2 (en) * 2012-02-16 2015-10-13 High Sec Labs Ltd. Secure audio peripheral device
US9288570B2 (en) 2013-08-27 2016-03-15 Bose Corporation Assisting conversation while listening to audio
US9190043B2 (en) 2013-08-27 2015-11-17 Bose Corporation Assisting conversation in noisy environments
US9143107B2 (en) * 2013-10-08 2015-09-22 2236008 Ontario Inc. System and method for dynamically mixing audio signals
US9451359B2 (en) * 2014-11-25 2016-09-20 Invensense, Inc. Preamplifier for a microphone
US9565493B2 (en) 2015-04-30 2017-02-07 Shure Acquisition Holdings, Inc. Array microphone system and method of assembling the same
US9554207B2 (en) 2015-04-30 2017-01-24 Shure Acquisition Holdings, Inc. Offset cartridge microphones
JP2017083600A (en) * 2015-10-27 2017-05-18 パナソニックＩｐマネジメント株式会社 On-vehicle sound pickup device and sound pickup method
US9941987B2 (en) * 2016-06-03 2018-04-10 Crestron Electronics, Inc. Single knob pre-amplifier gain-trim and fader
US10367948B2 (en) 2017-01-13 2019-07-30 Shure Acquisition Holdings, Inc. Post-mixing acoustic echo cancellation systems and methods
EP3804356A1 (en) 2018-06-01 2021-04-14 Shure Acquisition Holdings, Inc. Pattern-forming microphone array
US11297423B2 (en) 2018-06-15 2022-04-05 Shure Acquisition Holdings, Inc. Endfire linear array microphone
WO2020061353A1 (en) 2018-09-20 2020-03-26 Shure Acquisition Holdings, Inc. Adjustable lobe shape for array microphones
JP7230427B2 (en) 2018-10-24 2023-03-01 ヤマハ株式会社 SOUND SIGNAL PROCESSING DEVICE, MIXER, AND SOUND SIGNAL PROCESSING METHOD
US11558693B2 (en) 2019-03-21 2023-01-17 Shure Acquisition Holdings, Inc. Auto focus, auto focus within regions, and auto placement of beamformed microphone lobes with inhibition and voice activity detection functionality
CN113841419A (en) 2019-03-21 2021-12-24 舒尔获得控股公司 Housing and associated design features for ceiling array microphone
US11438691B2 (en) 2019-03-21 2022-09-06 Shure Acquisition Holdings, Inc. Auto focus, auto focus within regions, and auto placement of beamformed microphone lobes with inhibition functionality
EP3973716A1 (en) 2019-05-23 2022-03-30 Shure Acquisition Holdings, Inc. Steerable speaker array, system, and method for the same
US11302347B2 (en) 2019-05-31 2022-04-12 Shure Acquisition Holdings, Inc. Low latency automixer integrated with voice and noise activity detection
EP4018680A1 (en) 2019-08-23 2022-06-29 Shure Acquisition Holdings, Inc. Two-dimensional microphone array with improved directivity
US12028678B2 (en) 2019-11-01 2024-07-02 Shure Acquisition Holdings, Inc. Proximity microphone
US11552611B2 (en) 2020-02-07 2023-01-10 Shure Acquisition Holdings, Inc. System and method for automatic adjustment of reference gain
US11706562B2 (en) 2020-05-29 2023-07-18 Shure Acquisition Holdings, Inc. Transducer steering and configuration systems and methods using a local positioning system
JP2024505068A (en) 2021-01-28 2024-02-02 シュアー アクイジッション ホールディングス インコーポレイテッド Hybrid audio beamforming system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2146816A5 (en) * 1971-07-20 1973-03-02 Technicon Instr

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US3160707A (en) * 1961-06-29 1964-12-08 Vernon J Meyers Gain control in response to ambient noise level
US3296532A (en) * 1963-04-02 1967-01-03 Raytheon Co Diversity combiners
DE1914071B2 (en) * 1969-03-20 1971-07-22 Blaupunkt Werke GmbH, 3200 Hildes heim CIRCUIT ARRANGEMENT FOR AUTOMATIC LEVEL CONTROL
US3755625A (en) * 1971-10-12 1973-08-28 Bell Telephone Labor Inc Multimicrophone loudspeaking telephone system
US3814856A (en) * 1973-02-22 1974-06-04 D Dugan Control apparatus for sound reinforcement systems
JPS5337558Y2 (en) * 1973-08-27 1978-09-12

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2146816A5 (en) * 1971-07-20 1973-03-02 Technicon Instr

Also Published As

Publication number Publication date
GB1516256A (en) 1978-06-28
US3992584A (en) 1976-11-16
DE2640006A1 (en) 1978-03-09
DE2640006C2 (en) 1983-11-10
FR2363254B1 (en) 1981-01-09

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Legal Events

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